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參數(shù)資料
| 型號(hào)： | LT3461ES6 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.3MHz/3MHz Step-Up DC/DC Converters with Integrated Schottky in ThinSOT |
| 中文描述： | 0.6 A SWITCHING REGULATOR, 1700 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封裝： | PLASTIC, MO-193, TSOT-23, 6 PIN |
| 文件頁(yè)數(shù)： | 6/8頁(yè) |
| 文件大小： | 149K |
| 代理商： | LT3461ES6 |
LT3461/LT3461A
6
3461af
Inductor Selection
The inductors used with the LT3461/LT3461A should
have a saturation current rating of 0.3A or greater. If the
device is used in an application where the input supply will
be hot-plugged, then the saturation current rating should
be equal to or greater than the peak inrush current. For the
LT3461, an inductor value between 10
μ
H and 47
μ
H,
depending upon output voltage, will usually be the best
choice for most designs. For the LT3461A, inductor values
between 4.7
μ
H and 15
μ
H inductor will suffice for most
applications. For best loop stability results, the inductor
value selected should provide a ripple current of 70mA or
more. For a given V
IN
and V
OUT
the inductor value to use
with LT3461A is estimated by the formula:
L (in microhenries) =
D V
V
A
V
IN
OUT
1
1
sec
1
where D
=
+
+
V
V
V
V
V
OUT
IN
OUT
1
1
–
Use twice this value for the LT3461.
Capacitor Selection
Low ESR capacitors should be used at the output to
minimize the output voltage ripple. Multilayer ceramic
capacitors using X5R/X7R dielectrics are preferred as they
have a low ESR and maintain capacitance over wide
voltage and temperature range. A 2.2
μ
F output capacitor
is sufficient for most applications using the LT3461, while
a 1
μ
F capacitor is sufficient for most applications using
the LT3461A. High output voltages typically require less
capacitance for loop stability. Always use a capacitor with
sufficient voltage rating.
Either ceramic or solid tantalum capacitors may be used
for the input decoupling capacitor, which should be placed
as close as possible to the LT3461/LT3461A. A 1
μ
F
capacitor is sufficient for most applications.
Phase Lead Capacitor
A small value capacitor can be added across resistor R1
between the output and the FB pin to reduce output
perturbation due to a load step and to improve transient
response. This phase lead capacitor introduces a pole-
zero pair to the feedback that boosts phase margin near
the cross-over frequency. The following formula is useful
to estimate the capacitor value needed:
C
k
2
R
pF
1
PL
=
500
For an application running 50
μ
A in the feedback divider,
capacitor values from 10pF to 22pF work well.
APPLICATIU
W
U
U
TYPICAL APPLICATIO S
Figure 4. 5V to 12V with Soft-Start Circuit (LT3461A)
Input Current and Output Voltage
V
IN
5V
L1
10
μ
H
R1
261k
R2
30.1k
C2
1
μ
F
15pF
C1
1
μ
F
V
12V
70mA
1
2
V
IN
V
OUT
SW
3
4
5
6
FB
SHDN
GND
LT3461A
3461a TA02a
CONTROL
SIGNAL
47nF
47k
C1, C2: TAIYO YUDEN EMK212BJ105
L1: MURATA LQH32CN100K53
I
IN
50mA/DIV
CONTROL
SIGNAL
5V/DIV
1ms/DIV
V
5V/DIV
3461a TA02b
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT3461 | 1.3MHz/3MHz Step-Up DC/DC Converters with Integrated Schottky in ThinSOT |
| LT3461A | 1.3MHz/3MHz Step-Up DC/DC Converters with Integrated Schottky in ThinSOT |
| LT3463A | Dual Micropower DC/DC Converters with Schottky Diodes |
| LT3463AEDD | Dual Micropower DC/DC Converters with Schottky Diodes |
| LT3463EDD | Dual Micropower DC/DC Converters with Schottky Diodes |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT3461ES6#PBF | 制造商:Linear Technology 功能描述: 制造商:Linear Technology 功能描述:DC-DC CONVERTER BOOST 1.3MHZ TSOT-23- 制造商:Linear Technology 功能描述:DC-DC CONVERTER, BOOST, 1.3MHZ, TSOT-23- 制造商:Linear Technology 功能描述:DC-DC CONVERTER, BOOST, 1.3MHZ, TSOT-23-6, Primary Input Voltage:16V, No. of Outputs:1, Output Current:420mA, No. of Pins:6, Operating Temperature Min:-40C, Operating Temperature Max:85C, MSL:MSL 1 - Unlimited , RoHS Compliant: Yes 制造商:Linear Technology 功能描述:SP-SWREG/Monolithic, cut tape 300mA, 1.3MHz Boost Cnvtr w/Internal Schottky |
| LT3461ES6#TR | 功能描述:IC REG BOOST ADJ 0.25A TSOT23-6 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開(kāi)關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無(wú) 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC |
| LT3461ES6#TRM | 功能描述:IC REG BOOST ADJ 0.25A TSOT23-6 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開(kāi)關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無(wú) 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC |
| LT3461ES6#TRMPBF | 功能描述:IC REG BOOST ADJ 0.25A TSOT23-6 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 產(chǎn)品培訓(xùn)模塊:High Efficiency Current Mode Switching Regulators CMOS LDO Regulators 特色產(chǎn)品:BD91x Series Step-Down Regulators 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:兩者兼有 輸出數(shù):2 輸出電壓:3.3V，0.8 V ~ 2.5 V 輸入電壓:4.5 V ~ 5.5 V PWM 型:電流模式 頻率 - 開(kāi)關(guān):1MHz 電流 - 輸出:1.5A 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:20-VFQFN 裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:VQFN020V4040 產(chǎn)品目錄頁(yè)面:1373 (CN2011-ZH PDF) 其它名稱:BD9152MUV-E2TR |
| LT3461ES6#TRPBF | 功能描述:IC REG BOOST ADJ 0.25A TSOT23-6 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開(kāi)關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無(wú) 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC |
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